InboxSDK for Gmail hits 2.5M end users

1) Consumer companies who want to integrate their product into gmail (for a better UX and better for retention). The use cases here mainly revolve around sending and receiving rich content (i.e. gifs from giphy or dropbox preview links, etc).

2) Enterprise companies who want their users to have easy access to the data right inside Gmail alongside emails. Typically, this is a CRM (like Streak) or a hiring tool (that shows candidate history right next to the emails from them)

3) Internal Only tools - typically tools that help internal users with daily workflow automation.